Field Access Lattice Column Discriminator
Original Publication Date: 1978-Feb-01
Included in the Prior Art Database: 2005-Feb-20
A collapse discriminator is a bubble device component which determines the state of a bubble by its behavior when the bubble is subject to a Z-axis (bias direction) field pulse. A collapse discriminator is particularly useful in connection with a bubble lattice device having bubbles positioned in a close-packed array. The one-level version in Fig. 1 avoids the problem of crossing the propagation path with the permalloy conductor. Fig. 2 shows a two-level version. In both cases the problem of bubble stripe-out after discrimination is avoided by positioning the component at the interface between close-packed and isolated bubble region and using the associated current conductors to temporarily bias the close-packed bubbles.